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CVE-2026-34487

Apache Tomcat vulnerable to Insertion of Sensitive Information into Log File

CVSS score

7.5

EPSS probability

%0.4

Risk score

0.0

Published

6 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-34487 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

Insertion of Sensitive Information into Log File vulnerability in the cloud membership for clustering component of Apache Tomcat exposed the Kubernetes bearer token. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.20, from 10.1.0-M1 through 10.1.53, from 9.0.13 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fix the issue.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-34487 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1mavenorg.apache.tomcat:tomcat View
2mavenorg.apache.tomcat:tomcat View
3mavenorg.apache.tomcat:tomcat View
4mavenorg.apache.tomcat:tomcat-tribes View
5mavenorg.apache.tomcat:tomcat-tribes View
6mavenorg.apache.tomcat:tomcat-tribes View
7mavenorg.apache.tomcat.embed:tomcat-embed-core View
8mavenorg.apache.tomcat.embed:tomcat-embed-core View
9mavenorg.apache.tomcat.embed:tomcat-embed-core View
10mavenorg.apache.tomcat:tomcat-tribes View
11mavenorg.apache.tomcat:tomcat-tribes View
12mavenorg.apache.tomcat:tomcat-tribes View
13mavenorg.apache.tomcat:tomcat View
14mavenorg.apache.tomcat:tomcat View
15mavenorg.apache.tomcat:tomcat View
16mavenorg.apache.tomcat.embed:tomcat-embed-core View
17mavenorg.apache.tomcat.embed:tomcat-embed-core View
18mavenorg.apache.tomcat.embed:tomcat-embed-core View
Total affected vendors: 1|Products: 18

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
7.5CVSS 3.x—Vector not publishedGitHub Advisory
0.0CVSS 4.0—Vector not publishedGitHub Advisory

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

9 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

osvorg.apache.tomcat:tomcat-tribes9.0.117

OSV düzeltilmiş sürüm: 9.0.117

osvorg.apache.tomcat:tomcat-tribes10.1.54

OSV düzeltilmiş sürüm: 10.1.54

osvorg.apache.tomcat:tomcat-tribes11.0.21

OSV düzeltilmiş sürüm: 11.0.21

osvorg.apache.tomcat:tomcat9.0.117

OSV düzeltilmiş sürüm: 9.0.117

osvorg.apache.tomcat:tomcat10.1.54

OSV düzeltilmiş sürüm: 10.1.54

osvorg.apache.tomcat:tomcat11.0.21

OSV düzeltilmiş sürüm: 11.0.21

osvorg.apache.tomcat.embed:tomcat-embed-core9.0.117

OSV düzeltilmiş sürüm: 9.0.117

osvorg.apache.tomcat.embed:tomcat-embed-core10.1.54

OSV düzeltilmiş sürüm: 10.1.54

osvorg.apache.tomcat.embed:tomcat-embed-core11.0.21

OSV düzeltilmiş sürüm: 11.0.21

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-34487 is associated with the following CWEs:

CWE-532: Common Weakness Enumeration Entry CWE-532

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-34487 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://nvd.nist.gov/vuln/detail/CVE-2026-34487vendor-advisoryhttps://lists.apache.org/thread/4xpkwolpkrj8v5xzp5nyovtlqp3y850hvendor-advisoryhttp://www.openwall.com/lists/oss-security/2026/04/09/28vendor-advisoryhttps://github.com/apache/tomcat/commit/301bc6efbf72feb14dacfdfa3f50372182736150vendor-advisoryhttps://github.com/apache/tomcat/commit/5eff2a773b8b728083e5195b3183df1b9e12a03dvendor-advisoryhttps://github.com/apache/tomcat/commit/f593292a082e5ef9336a8db2b4b522f7f3e36976vendor-advisoryhttps://tomcat.apache.org/security-10.htmlvendor-advisoryhttps://tomcat.apache.org/security-11.htmlvendor-advisoryhttps://tomcat.apache.org/security-9.htmlvendor-advisoryhttps://github.com/advisories/GHSA-x4m4-345f-5h5gvendor-advisory

CVSS Vector Radar Chart

7.5 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)None

Yama doğrulandı

9 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

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Weakness Type (CWE & CAPEC)

CWE-532

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